I am going to be in Sydney for 3 full days. I am a keen trekker and was thinking of a trip to Katoomba for a short hike (sort of to say I did trek a mountain in Oz!). How far away is Katoomba from Sydney and what is the best way to get there? Can anyone recommend any short treks (a couple hours, half day maybe? Would it be advisable to spend a night in Katoomba and then head back to Sydney? Any assistance will be most appreciated. Thank you.